Saute the pancetta or bacon until golden brown. Drain on paper towels.
Combine the eggs, half the cheese, cream, salt, and pepper in a large serving
bowl and beat to combine thoroughly.
Cook the pasta according to the package directions until al dente (firm to the
bite). Drain and immediately add to the serving bowl, tossing to coat the pasta
with the sauce. The hot pasta will cook the eggs and make the sauce thicken. If
necessary, return the pasta with the sauce to the cooking pot and shake over very
low heat until the sauce thickens.
Top with the cooked pancetta and the remaining cheese.